CN105611676A - Streetlamp dimming system capable of transmitting signals by directly utilizing power line - Google Patents
Streetlamp dimming system capable of transmitting signals by directly utilizing power line Download PDFInfo
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- CN105611676A CN105611676A CN201610107595.XA CN201610107595A CN105611676A CN 105611676 A CN105611676 A CN 105611676A CN 201610107595 A CN201610107595 A CN 201610107595A CN 105611676 A CN105611676 A CN 105611676A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Abstract
The invention discloses a streetlamp dimming system capable of transmitting signals by directly utilizing a power line. The streetlamp dimming system comprises a streetlamp concentrated controller connected with the power line in series, and multiple streetlamps connected with the power line in parallel; the streetlamp concentrated controller sends a dimming control signal to the streetlamps by directly utilizing the power line, wherein the streetlamp concentrated controller comprises a first power supply module, a power line signal sending module, a main control module, an electric meter module, a key module, a display module and a remote data communication module. By adoption of the technical scheme provided by the invention, the streetlamp dimming control signal can be transmitted by directly utilizing the power line through the simple circuit structure; meanwhile, the dimming control signal transmission can be realized by only requiring one period of power line alternating current signals, so that the power grid stabilization is greatly ensured; and furthermore, the dimming control signal at least keeps the complete half wave of a single period of alternating current electric signals as the energy supply, so that a blinking phenomenon does not appear in the dimming process even if a conduction angle is quite small.
Description
Technical field
The invention belongs to street lamp control field, relate in particular to a kind of street lamp that directly utilizes power line transmission signalsLight adjusting system.
Background technology
Along with the develop rapidly of LED technology, intelligent dimming is widely used, and especially leads at street lightingTerritory, street light modulating control can reasonable distribution road lighting, saves the energy. Prior art street light modulating systemMostly just supply electric flux by power line for street lamp provides, and cannot directly transmit and control letter by power lineNumber. Certainly the road lamp system of prior art also adopts the mode of power line carrier can pass through power line in fact simultaneouslyThe transmission of existing data and energy, but power line carrier mode is with the height of information by coupling on power lineFrequently carrier signal, realizes light modulation thereby each street lamp end extracts by the detection of carrier module high frequency the information sendingControl; Therefore, need in street lamp control end and each street lamp, power line carrier circuit be set, cost is non-Chang Anggui, on electrical network, loading high frequency carrier can pollute electrical network simultaneously, makes electrical network unstable, causesSignal transmission is unstable. In addition other street light modulating systems, such as, adopt wireless way for transmitting to adjustOptical signal, although without arranging in addition circuit, need to install wireless transceiver, and adopt on each street lampRealize street lamp control with complicated algorithm, in actual applications, wireless Zigbee agreement is in street lamp controlNecessarily applied.
In addition, conventional AC light modulation conventionally adopts and regulates light modulation phase angle to control the brightness of LED lamp, is alsoThe angle of flow (ON time) of alternating current in light modulation one-period, this dimming mode essence is to reduceLED lamp operating power is realized and is exchanged light modulation, because the power of angle of flow output is simultaneously also as LED lampOperating voltage, when the angle of flow very hour, its power output is not enough to maintain LED lamp while normally working,There is scintillation in LED lantern festival, therefore, and light modulation when this dimming mode is not suitable for small-power.
Therefore, for the above-mentioned defect existing in currently available technology, be necessary to study in fact, to provide oneThe scheme of kind, solves the defect existing in prior art.
Summary of the invention
In view of this, necessaryly provide a kind of street light modulating system of directly utilizing power line transmission signals,Can directly utilize power line to realize street light modulating, without increasing control circuit or loading high in power lineFrequently carrier wave, thus meet better the demand of actual street lamp control application scenario.
The defect existing in order to overcome prior art, the invention provides following technical scheme:
A street light modulating system of directly utilizing power line transmission signals, comprises and being serially connected in power lineStreet lamp central controller and be attempted by the multiple street lamps on this power line, described street lamp central controller is straightConnect power line and sent dimming control signal to described street lamp; Wherein, described street lamp central controller bagDraw together the first power module, power line signal sending module, main control module, ammeter module, key-press module,Display module and remote data communication module;
Described the first power module is connected with power line, is used to described street lamp central controller that confession is providedElectricity;
Described remote data communication module is carried out data communication for remote monitoring center;
Described power line signal sending module comprises the first zero passage detection module, emission control module and Qie BoModule, described the first zero passage detection module is for detection of the zero point of ac signal and this zero point detectedTime produce first zero triggering signal;
The described mode piece of cutting is serially connected in power line, for cutting the ac signal of power line;
Described emission control module receives described first zero triggering signal and advises according to predefined codingDescribed in controlling, cutting mode piece cuts the ac signal in power line;
Described power line signal sending module receives the light modulation information that described main control module sends, and described in inciting somebody to actionLight modulation information is carried in the ac signal of power line one-period and forms dimming control signal; Described tuneOptical information comprises brightness ratio value, and described power line signal sending module makes by cutting mode piece described in controllingThe ac signal in single cycle retains complete positive half-wave or negative half-wave and described brightness ratio value is transformedFor the angle of flow of other half cycle signal in this cycle forms described dimming control signal;
Described street lamp comprises second source module, power line signal receiver module, single-lamp controller, drivingModule and lamp source, wherein, described second source module is connected with power line, is used to described power lineSignal receiving module and single-lamp controller provide power supply;
Described power line signal receiver module is used for receiving on power line dimming control signal and according to establishing in advanceDescribed in fixed coding rule demodulation, dimming control signal obtains light modulation information, and it further comprises the second zero passageDetection module, reception control module and detection module, described the second zero passage detection module is for detection of interchangeThe zero point of the signal of telecommunication and in the time this zero point being detected, produce second zero point triggering signal;
Described detection module is for detection of the cutting tip of ac signal in power line;
Described reception control module is obtained in power line according to described the second zero passage detection module and detection moduleThe angle of flow of ac signal is also converted to light modulation information and sends to described single-lamp controller;
Described in thereby described single-lamp controller is realized according to the output of driver module described in this light modulation information controlThe brilliance control in lamp source.
Preferably, described dimming control signal comprises the first dim signal and the second dim signal, describedOne dim signal retain the single cycle ac signal positive half-wave and make its negative half-wave load the angle of flow;
Described the second dim signal retain the single cycle ac signal negative half-wave and its positive half-wave is addedCarry the angle of flow.
Preferably, described dimming control signal also comprises header signal and end signal, described header signalBe arranged on the head of described dimming control signal, start for the transmission that identifies described dimming control signal;Described end signal is arranged on the afterbody of described dimming control signal, for identifying described dimming control signalTransmission finish; Described header signal and end signal are to form numeral by data signal ' 1 ' and ' 0 'Code signal, described data signal ' 1 ' and ' 0 ' is by cutting mode piece described in controlling to the single cycleThe positive half-wave of ac signal or negative half-wave carry out complete cutting and form.
Preferably, the positive half-wave that described data signal ' 1 ' is the ac signal in single cycle of reservation is also completeThe negative half-wave of whole cutting and forming, described data signal ' 0 ' is for retaining ac signal negative in single cycleHalf-wave complete cutting positive half-wave and form.
Preferably, the positive half-wave that described data signal ' 0 ' is the ac signal in single cycle of reservation is also completeThe negative half-wave of whole cutting and forming, described data signal ' 1 ' is for retaining ac signal negative in single cycleHalf-wave complete cutting positive half-wave and form.
Preferably, in described header signal and end signal, described data signal ' 1 ' and data signal ' 0 'Number balance.
Preferably, described in, cutting mode piece is metal-oxide-semiconductor or controllable silicon.
Preferably, described detection module is realized by comparator.
Preferably, described the first zero passage detection module and described the second zero passage detection module are by photoelectrical couplerRealize.
Preferably, described emission control module and described reception control module are single-chip microcomputer.
Compared with prior art, technical scheme of the present invention, adopts simple circuit structure to realize directly profitBy power line transmission street light modulating control signal, greatly reduce the cost of street light modulating system; Meanwhile,Only need the power line AC signal of one-period just can realize the transmission of dimming control signal less, hardlyCan produce any interference to electrical network, greatly ensure the stabilization of power grids; Further, dimming control signal is only adoptedModulate the angle of flow with the half-wave in single cycle ac signal, at least retain single cycle ac signalIn complete half-wave as energy supply, therefore, even if the angle of flow is very hour, street light modulating process is not yetThere will be scintillation.
Brief description of the drawings
Fig. 1 is the Organization Chart of a kind of street light modulating system of directly utilizing power line transmission signals of the present invention.
Fig. 2 is that in a kind of street light modulating system of directly utilizing power line transmission signals of the present invention, street lamp is concentratedThe theory diagram of controller.
Fig. 3 is power line letter in a kind of street light modulating system of directly utilizing power line transmission signals of the present inventionThe theory diagram of number sending module.
Fig. 4 is the oscillogram of single cycle dimming control signal.
Fig. 5 is the former of street lamp in a kind of street light modulating system of directly utilizing power line transmission signals of the present inventionReason block diagram.
Fig. 6 is power line letter in a kind of street light modulating system of directly utilizing power line transmission signals of the present inventionThe theory diagram of number receiver module.
Fig. 7 is the signal frame form of dimming control signal of the present invention.
Fig. 8 is data signal ' 1 ' and a kind of signal waveform of ' 0 ' in the present invention.
Fig. 9 is data signal ' 1 ' and ' 0 ' another kind of signal waveform in the present invention.
Figure 10 is the theory diagram of ammeter module in the present invention.
Figure 11 is the circuit theory diagrams of voltage acquisition module in ammeter module of the present invention.
Figure 12 is the circuit theory diagrams of voltage acquisition module in ammeter module of the present invention.
Figure 13 is the another kind of embodiment of street lamp central controller in the present invention.
Figure 14 is the another kind of embodiment of street lamp in the present invention.
The data signal that Figure 15 forms in the time that street lamp central controller sends information for street lamp in the present invention' 1 ' and ' 0 ' waveform.
Figure 16 be in the present invention street lamp to the data transmission format of street lamp central controller.
Following specific embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Detailed description of the invention
Below with reference to accompanying drawing, the invention will be further described.
In order to overcome the defect of prior art, the present invention proposes a kind of framework simple, realize convenient and propertyThe street light modulating system of directly utilizing power line transmission signals that can be good. Referring to Fig. 1, be depicted as the present inventionThe Organization Chart that directly utilizes the street lamp control system of power line transmission signals, comprises and being serially connected in power lineStreet lamp central controller and be attempted by the multiple street lamps on this power line is multiple street lamps by power linePower supply is provided, and street lamp central controller can directly send light modulation control by power line to described street lamp simultaneouslySignal processed, thus only just realize the transmission of Power supply and signal by power line, without framework signal againTransmission network, also without load high-frequency carrier signal in power line.
Referring to Fig. 2, be depicted as in a kind of street light modulating system of directly utilizing power line transmission signals of the present inventionThe theory diagram of street lamp central controller, street lamp central controller further comprises the first power module, electricityLine of force signal transmitting module, main control module, ammeter module, key-press module, display module and teledataCommunication module;
The first power module is connected with power line, is used to street lamp central controller that power supply is provided;
Remote data communication module is carried out data communication for remote monitoring center; Remote monitoring center is wholeThe control centre of street light modulating system, has been in charge of whole street light modulating system, has information storage, pipeManage, inquire about and control power line network and provide remote access function by Internet. TeledataCommunication module is equivalent to an access point of access outer remote Surveillance center in street lamp central controller, by roadThe data message of lamp Centralized Controller sends to remote monitoring center, the also control of receiving remote Surveillance center simultaneouslySystem is ordered, and then realizes the brightness adjustment control of road lamp system.
Key-press module is used for inputting configuration information and control information; Display module is used for showing that current street lamp is concentratedController and and the duty of the street lamp that connects; Ammeter module is used for gathering electrical network parameter information.
Main control module is the control centre of street lamp central controller, with the first power module, power line signalSending module, ammeter module, key-press module, display module and remote data communication module are connected, andControl the normal work of each functional module;
Referring to Fig. 3, directly utilize electric power in the street light modulating system of power line transmission signals for the present invention is a kind ofThe theory diagram of line signal transmitting module, comprises the first zero passage detection module, emission control module and Qie BoModule, emission control module can be combined into a control chip with main control module certainly, also can be by twoIndependently control chip is realized.
The first zero passage detection module produces for detection of the zero point of ac signal and in the time this zero point being detectedFirst zero triggering signal;
Cut mode piece and be serially connected in power line, for cutting the ac signal of power line; Excellent in oneSelect in embodiment, cutting mode piece is metal-oxide-semiconductor or controllable silicon, by emission control module controls MOSThereby realizing, pipe or silicon controlled conducting or disconnection cut ripple.
Emission control module receives first zero triggering signal and cuts according to predefined coding rule controlMode piece cuts the ac signal in power line;
The control command that main control module sends according to the input message of key-press module or remote monitoring center toThe light modulation information that power line signal sending module sends, general light modulation information is generally brightness ratio value, thanAs being 50% by the brightness regulation of the street lamp under a certain street lamp central controller.
According to receiving light modulation information, emission control module is cut mode piece by control, makes the single cycleAc signal retains complete positive half-wave or negative half-wave and brightness ratio value is converted in this cycle in additionThe angle of flow of half cycle signal forms dimming control signal, as shown in Figure 4, single cycle light modulation control is shown respectivelySignal processed retains respectively complete positive half-wave and retains the signal waveform of complete negative half-wave, and wherein, perpendicular dotted line isThe angle of flow, horizontal dotted line is the wave band through cutting the excision of mode piece.
Adopt technique scheme, only need the ac signal of one-period, just light modulation information can be addedBe loaded in power line ac signal and form dimming control signal; Meanwhile, at least retain single cycle interchangeHalf-wave complete in the signal of telecommunication is as energy supply, therefore, even if the angle of flow is very hour, street light modulatingProcess also there will not be scintillation.
Referring to Fig. 5, be depicted as in a kind of street light modulating system of directly utilizing power line transmission signals of the present inventionThe theory diagram of street lamp, street lamp comprise second source module, power line signal receiver module, single-lamp controller,Driver module and lamp source, wherein, second source module is connected with power line, is used to power line signal to connectReceive module and single-lamp controller power supply is provided; Power line signal receiver module is used for receiving power line and raises light-operatedSignal processed also obtains light modulation information according to predefined coding rule demodulation dimming control signal.
Referring to Fig. 6, be depicted as in a kind of street light modulating system of directly utilizing power line transmission signals of the present inventionThe theory diagram of power line signal receiver module, further comprises the second zero passage detection module, receives and control mouldPiece and detection module, certainly, receive control module and can be integrated in single-lamp controller, also can with single lamp controlDevice split processed arranges.
The second zero passage detection module produces for detection of the zero point of ac signal and in the time this zero point being detectedSecond zero point triggering signal;
Detection module, for detection of the cutting tip of ac signal in power line, is preferably implemented in oneIn mode, detection module is realized by comparator, and the reference voltage of comparator is set to no-voltage, through cuttingAc signal after cutting is also no-voltage, equates with reference voltage, and output low level, otherwise export highLevel.
Receiving control module obtains and in power line, exchanges telecommunications according to the second zero passage detection module and detection moduleNumber the angle of flow, while receiving control module each zero point, trigger timing signal, when low level by measuringBetween, thereby calculate the angle of flow, and be converted to light modulation information and send to single-lamp controller; Single lamp controlThereby device is realized the brilliance control in lamp source according to the output of this light modulation information control driver module.
In a kind of preferred embodiment, referring to Fig. 7, be depicted as the signal frame form of dimming control signal,Dimming control signal comprises header signal, end signal, the first dim signal and the second dim signal, theIt is identical that one dim signal and the second dim signal load light modulation information, but the first dim signal retainsThe positive half-wave of the ac signal in single cycle also makes its negative half-wave load the angle of flow, and the second dim signalRetain the single cycle ac signal negative half-wave and make its positive half-wave load the angle of flow, due to the first tuneThe angle of flow of optical signal and the second dim signal is respectively in positive half-wave and negative half-wave, thereby electrical network is tending towardsBalance, effectively avoids producing humorous wave interference in data transmission procedure.
Header signal is arranged on the head of dimming control signal, opens for the transmission that identifies dimming control signalBegin; End signal is arranged on the afterbody of dimming control signal, for identifying the transmission knot of dimming control signalBundle; Header signal and end signal are to form digitally encoded signal by data signal ' 1 ' and ' 0 ', forMake electrical network balance more, in a kind of preferred embodiment, in header signal and end signal, numeralThe number balance of signal ' 1 ' and data signal ' 0 '. Such as header signal is ' 10101010 ', andEnd signal is ' 11001100 ', and the number of data signal ' 1 ' and data signal ' 0 ' is substantially equal,Effectively avoid producing humorous wave interference in data transmission procedure.
Data signal ' 1 ' and ' 0 ' to the ac signal in single cycle is just being cut mode piece by controlHalf-wave or negative half-wave carry out complete cutting and form. Shown in Figure 8, be data signal ' 1 ' and ' 0 'A kind of signal waveform, data signal ' 1 ' is for retaining the positive half-wave of ac signal in single cycle completeWhole cutting is born half-wave and is formed, and data signal ' 0 ' is the negative half-wave of the ac signal in single cycle of reservationAnd complete cutting positive half-wave and forming.
Shown in Figure 9, be the another kind of signal waveform of data signal ' 1 ' and ' 0 ', data signal ' 0 'For the positive half-wave of ac signal the negative half-wave of complete cutting that retain the single cycle form, data signal' 1 ' forms for the negative half-wave of ac signal the complete cutting positive half-wave that retain the single cycle.
One preferred embodiment in, the first zero passage detection module and the second zero passage detection module are by lightElectric coupler is realized.
One preferred embodiment in, emission control module and receive control module be single-chip microcomputer.
Referring to Figure 10, be depicted as the theory diagram of ammeter module, ammeter module comprises at least one voltage acquisitionModule, at least one current acquisition module and electric energy metering module, wherein,
Described voltage acquisition module is connected with power line, for gathering the voltage signal of power line;
Described current acquisition module is connected with power line, for gathering the current signal of power line;
Controlled and the described main control module of described electric energy metering module, and with described voltage acquisition module and described electricityStream acquisition module is connected, for measuring electrical network according to described voltage acquisition module and described current acquisition moduleParameter.
Referring to Figure 11, be depicted as the circuit theory diagrams of voltage acquisition module in ammeter module of the present invention, compriseThe first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5,Six resistance R 6, the first capacitor C 1 and voltage transformer, wherein, one end of the first resistance R 1 and power lineLive wire be connected, the other end of the first resistance R 1 is connected with one end of the second resistance R 2, the second electricityThe resistance other end of R2 and 1 end of voltage transformer input are connected, 2 ends of voltage transformer inputBe connected with one end of the 6th resistance R 6, one end phase of the other end of the 6th resistance R 6 and the 5th resistance R 5Connect, the other end of the 5th resistance R 5 is connected with one end of the 4th resistance R 4, the 4th resistance R 4 separatelyOne end is connected with the zero line of power line; 1 end of voltage transformer output and one end of the 3rd resistance R 3Be connected with one end of the first capacitor C 1, and be jointly connected with electric energy metering module; Voltage transformer is defeated2 ends that go out end are connected with the other end of the first capacitor C 1 with the other end of the 3rd resistance R 3, and commonBe connected to the ground and connect.
In a kind of preferred embodiment, it is the voltage transformer of 1:1 that the present invention adopts turn ratio, concrete typeNumber be SPT204V, its effect is that high voltage is converted to according to a certain percentage for metering or Instrument useLow-voltage, simultaneously by voltage transformer by the isolation of high voltage and electrical equipment, ensure staffSafety. The specified input current of the voltage transformer of this model is 2mA, and output-current rating is 2mA,Nonlinearity is less than 0.1%, and the range of linearity is 0～10mA, and specified input maximum load is 500 Ω, itsPrecision is less than 1%, and after overcompensation, phase shift is less than 5 ', isolating withstand voltage is 2500V, operating temperature range-50℃～+65℃。
The input current of voltage transformer is by the first resistance R 1, the second resistance R 2, the 4th resistance R 4,The resistance of five resistance R 5 and the 6th resistance R 6 determines.
Owing to all there being the defect of aliasing effect in sample circuit, for preventing that distorted signals from must introduce anti-aliasingWave filter, generally adopts low pass filter to carry out filtering, in the present invention, and the 3rd resistance R 3 and the first electric capacityC1 has formed a RC wave filter. In order to make sample frequency obtain enough large declining when the 1.024MHZSubtract, used the RC wave filter that corner frequency is 5kHZ, wherein the resistance of the 3rd resistance R 3 is 1k Ω,The capacitance of the first capacitor C 1 is 2.2nf.
Referring to Figure 12, be depicted as the circuit theory diagrams of current acquisition module in ammeter module of the present invention, compriseCurrent transformer, the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10,Two capacitor C 2 and the 3rd capacitor C 3, wherein, the input of described current transformer is serially connected with power line,2 ends of the output of described current transformer and one end of described the 7th resistance R 7 and described the 8th resistanceOne end of R8 is connected, and the other end of described the 7th resistance R 7 is connected with one end of described the second capacitor C 2Connect, and be jointly connected with described electric energy metering module; 1 end of the output of described current transformer and instituteOne end of stating the 9th resistance R 9 is connected with one end of described the tenth resistance R 10, described the 8th resistance R 8The other end and the other end and described of the other end of described the 9th resistance R 9, described the second capacitor C 2One end of three capacitor C 3 is connected, and is jointly connected to the ground and connects; The other end of described the tenth resistance R 10 withThe other end of described the 3rd capacitor C 3 is connected, and is jointly connected with described electric energy metering module.
In a kind of preferred embodiment, it is SCT254A that the present invention adopts the model of current transformer, electric currentThe effect of transformer is that larger primary current is converted to lower secondary current according to a certain percentage for surveyingAmount and Instrument use. What current sampling circuit adopted is that turn ratio is the current transformer of 1:2000, specifiedInput current is 5A, and output-current rating is 2.5mA, and nonlinearity is less than 0.1%, the range of linearity is 0～20A, specified input maximum load is 800 Ω, after overcompensation, phase shift is less than 5 ', isolate withstand voltage being greater than3500V, operating temperature range-50 DEG C～+ 65 DEG C.
The 7th resistance R 7 and the second capacitor C 2, the tenth resistance R 10 and the 3rd capacitor C 3 form anti-aliasing filterRipple device, i.e. low pass filter, wherein, the resistance of the 7th resistance R 7 and the tenth resistance R 10 is 1k Ω, theThe capacitance of two capacitor C 2 and the 3rd capacitor C 3 is 2.2nf.
In a kind of preferred embodiment, electric energy metering module adopts the electric energy chip of ADI company of the U.S.ADE7880, this chip is a high accuracy, the three-phase electric energy metering IC that ADI company of the U.S. produces,Temperature is 25 DEG C, in dynamic range 2000:1 time, and effective value error, active power and first-harmonicReactive power error is all less than 0.1%, and reference voltage is 1.2V, and has the outside function of excessively driving. ADE7880There is I2C and SPI dual serial interface, I2C and with HSDC interface be used in conjunction with to access instantaneous voltage,The register such as electric current and instantaneous power. Voltage channel He Si road, ADE7880 You San road current channel calculates phaseVoltage, current effective value and the instantaneous value of voltage and phase current, frequency, total active power, fundamental wave reactive power meritRate, apparent energy, harmonic distortion rate and total active energy, fundamental wave reactive power electric energy, apparent electric energy etc. ThisOuter ADE788 provides three tunnel logic outputs, and various power informations are provided.
Technique scheme only by power line just can realize street lamp central controller to itself and connect eachIndividual street lamp signal transmission, but it can not realize from street lamp end to street lamp central controller signal transmission, andIn reality, street lamp end also needs to street lamp central controller feedback information, such as electrical energy parameter information, workStatus information, fault message etc., thus can be conducive to street lamp integrated management and trouble hunting. In order to solveAbove-mentioned technical problem, the present invention further proposes a kind of preferred embodiment.
Referring to Figure 13, be depicted as the another kind of embodiment of street lamp central controller in the present invention, also compriseRing current transformer and current detection module, it is mutual that the zero line in power line or live wire cover are through ring currentSensor, thus this ring current transformer can sense the electric current in power line in the mode of non-electrical contactAnd produce induced-current; Thereby current detection module is for amplifying induced-current and signal processing detectionCurrent value in power line, and this current value is sent to main control module.
Referring to Figure 14, be depicted as the another kind of embodiment of street lamp in the present invention, also comprise and be serially connected in electric powerSwitch module between line and driver module, this switch module is controlled by single-lamp controller, when switch module placeIn the time of off-state, thereby the input of driver module power supply is cut off without constant current signal output, and lamp source is in putting outState goes out; When switch module is during in conducting state, driver module is directly powered by power line, and according to listThe control signal of lamp controller regulates constant current signal output, and lamp source is in illuminating state.
Realize street lamp end and be to the principle of street lamp central controller signal transmission, the letter that street lamp will be transmittedNumber be converted to conducting or the disconnection of switch module in street lamp, and by controlling the conducting of switch module in street lampOr disconnect, can make the current signal in power line change, be also the street lamp signal that will transmit justBe carried in the variation of the current signal in power line; Street lamp central controller is by detecting the electricity in power lineThereby the signal that street lamp will transmit is obtained in the variation of stream signal.
Concrete, such as a street lamp central controller is mounted with 50 street lamps, suppose that each street lamp is normalThe power of work is 100w, and while normally work, bus efficiency is 5000w, because bus voltage is to hand overStream 220V, therefore bus current is also AC signal, and and street lamp general power be directly proportional. When closing oneIndividual street lamp, also only have 49 street lamps normally to work, and bus efficiency becomes 4900w, and bus efficiencyVariation will cause the variation of bus current signal amplitude, in above-mentioned situation of closing a street lamp, bus electricityThe amplitude of stream signal will diminish. Therefore, utilizing above-mentioned principle can realize street lamp passes to street lamp central controllerDefeated signal.
In street lamp, single-lamp controller, by conducting and the disconnection of gauge tap module, makes driver module powerAc voltage signal in the single cycle, form different waveforms, thereby for reference numbers signal ' 1 '' 0 '. Such as, can be to positive half-wave or the negative half-wave of the driver module Alternating Current Power Supply signal in single cycleCarry out complete cutting and form. Can be shown in Figure 15, street lamp produces numeral by gauge tap moduleSignal ' 1 ' and a kind of waveform voltage signal of ' 0 ', wherein, Figure 15-A is data signal ' 1 'Signal waveform, it is for retaining positive half-wave the complete cutting negative half of single cycle driver module Alternating Current Power Supply signalRipple and forming; Figure 15-B is the signal waveform of data signal ' 0 ', and it is for retaining single cycle driver moduleThe negative half-wave of Alternating Current Power Supply signal complete cutting positive half-wave and form. Figure 15-C is that Figure 15-A is correspondingBus current waveform, wherein dotted line is the waveform of driver module Alternating Current Power Supply signal while cutting, withThe variation representative digit signal ' 1 ' of this current waveform; Figure 15-D is the corresponding bus current of Figure 15-BWaveform, wherein dotted line is the waveform of driver module Alternating Current Power Supply signal while cutting, with this current waveformVariation representative digit signal ' 0 ', thus, street lamp central controller is by the variation of testbus electric currentObtain data signal ' 1 ' and ' 0 '.
Certainly in order to realize valid data communication, street lamp also needs to observe to street lamp central controller transmitted signalCertain data protocol, shown in Figure 16, street lamp transmitted signal further comprises header signal, street lampIdentification number, data message and end signal, header signal, street lamp identification number, data message and end signalBy the data signal of data signal ' 1 ' and ' 0 ' composition; Header signal and end signal are for identification numberReportedly defeated beginning and end, street lamp identification number is the well-determined identification number of each street lamp, for identifying thisData message by which street lamp is sended over; The data content of data message for sending, is mainlyElectrical energy parameter information, work state information, fault message etc.
The explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof. Should refer toGo out, for those skilled in the art, under the premise without departing from the principles of the invention, alsoCan carry out some improvement and modification to the present invention, these improvement and modify and also fall into the claims in the present inventionIn protection domain.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use thisInvention. To be apparent for those skilled in the art to the multiple amendment of these embodiment, General Principle as defined herein can be in the situation that not departing from the spirit or scope of the present invention,In other embodiment, realize. Therefore, the present invention will can not be restricted to these embodiment shown in this article, andTo meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a street light modulating system of directly utilizing power line transmission signals, is characterized in that, comprises serial connectionStreet lamp central controller in power line and be attempted by the multiple street lamps on this power line, described street lamp collectionMiddle controller directly sends dimming control signal by power line to described street lamp; Wherein, described street lamp is concentratedController comprises the first power module, power line signal sending module, main control module, ammeter module, buttonModule, display module and remote data communication module;
Described the first power module is connected with power line, is used to described street lamp central controller that power supply is provided;
Described remote data communication module is carried out data communication for remote monitoring center;
Described power line signal sending module comprises the first zero passage detection module, emission control module and cuts modePiece, described the first zero passage detection module is produced for detection of the zero point of ac signal and in the time this zero point being detectedRaw first zero triggering signal;
The described mode piece of cutting is serially connected in power line, for cutting the ac signal of power line;
Described emission control module receives described first zero triggering signal and according to predefined coding ruleDescribed in control, cutting mode piece cuts the ac signal in power line;
Described power line signal sending module receives the light modulation information that described main control module sends, and by described tuneOptical information is carried in the ac signal of power line one-period and forms dimming control signal; Described light modulation letterBreath comprises brightness ratio value, and described power line signal sending module makes single week by cutting mode piece described in controllingThe ac signal of phase retains complete positive half-wave or negative half-wave and described brightness ratio value is converted into this cycleThe interior angle of flow of half cycle signal in addition forms described dimming control signal;
Described street lamp comprises second source module, power line signal receiver module, single-lamp controller, driving mouldPiece and lamp source, wherein, described second source module is connected with power line, is used to described power line signalReceiver module and single-lamp controller provide power supply;
Described power line signal receiver module is used for receiving on power line dimming control signal and according to presettingCoding rule demodulation described in dimming control signal obtain light modulation information, it further comprises the second zero passage detectionModule, reception control module and detection module, described the second zero passage detection module is for detection of ac signalZero point and in the time this zero point being detected, produce second zero point triggering signal;
Described detection module is for detection of the cutting tip of ac signal in power line;
Described reception control module is obtained in power line and is handed over according to described the second zero passage detection module and detection moduleThe angle of flow of the stream signal of telecommunication is also converted to light modulation information and sends to described single-lamp controller;
Thereby described single-lamp controller is realized described lamp according to the output of driver module described in this light modulation information controlThe brilliance control in source.
2. the street lamp control system that directly utilizes power line transmission signals according to claim 1, its spyLevy and be, described dimming control signal comprises the first dim signal and the second dim signal, described the first light modulationSignal retain the single cycle ac signal positive half-wave and make its negative half-wave load the angle of flow;
Described the second dim signal retain the single cycle ac signal negative half-wave and its positive half-wave is loadedThe angle of flow.
3. the street lamp control system that directly utilizes power line transmission signals according to claim 2, its spyLevy and be, described dimming control signal also comprises header signal and end signal, and described header signal is arranged onThe head of described dimming control signal, starts for the transmission that identifies described dimming control signal; Described endSignal setting, at the afterbody of described dimming control signal, finishes for the transmission that identifies described dimming control signal;Described header signal and end signal are to form digitally encoded signal by data signal ' 1 ' and ' 0 ', described inData signal ' 1 ' and ' 0 ' is by cutting just half of the ac signal of mode piece to the single cycle described in controllingRipple or negative half-wave carry out complete cutting and form.
4. the street lamp control system that directly utilizes power line transmission signals according to claim 3, its spyLevy and be, positive half-wave complete cutting that described data signal ' 1 ' is the ac signal in single cycle of reservationBear half-wave and form, the negative half-wave that described data signal ' 0 ' is the ac signal in single cycle of reservation is also completeWhole cutting positive half-wave and forming.
5. the street lamp control system that directly utilizes power line transmission signals according to claim 3, its spyLevy and be, positive half-wave complete cutting that described data signal ' 0 ' is the ac signal in single cycle of reservationBear half-wave and form, the negative half-wave that described data signal ' 1 ' is the ac signal in single cycle of reservation is also completeWhole cutting positive half-wave and forming.
6. the street lamp control system that directly utilizes power line transmission signals according to claim 3, its spyLevy and be, in described header signal and end signal, described data signal ' 1 ' and data signal ' 0 'Number balance.
7. the street lamp control system that directly utilizes power line transmission signals according to claim 1, its spyLevy and be, described in to cut mode piece be metal-oxide-semiconductor or controllable silicon.
8. the street lamp control system that directly utilizes power line transmission signals according to claim 1, its spyLevy and be, described detection module is realized by comparator.
9. the street lamp control system that directly utilizes power line transmission signals according to claim 1, its spyLevy and be, described the first zero passage detection module and described the second zero passage detection module are realized by photoelectrical coupler.
10. the street lamp control system that directly utilizes power line transmission signals according to claim 1, its spyLevy and be, described emission control module and described reception control module are single-chip microcomputer.
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Application publication date: 20160525 Assignee: ZHEJIANG JINKONG ELECTRIC CO., LTD. Assignor: Hangzhou Electronic Science and Technology Univ Contract record no.: 2018330000071 Denomination of invention: Streetlamp dimming system capable of transmitting signals by directly utilizing power line Granted publication date: 20171031 License type: Common License Record date: 20180613 |